EP3037683B1 - Auxiliary locking drive for a motor vehicle lock - Google Patents

Description

The invention relates to a closing auxiliary drive for a motor vehicle lock with the features of the preamble of claim 1 and a method for producing a Schließhilfsantriebs with the features of the preamble of claim 16th

In the present case, all types of door, hood, lid or flap locks are summarized under the term "motor vehicle lock".

From the DE 19 31 732 A1 For example, it is known to attach Bowden cables to motor vehicle parts prior to their installation on these and to connect the two Bowden cables after installation by connecting pieces. The DE 19 31 732 A1 now suggests a particularly preferred embodiment of this compound of two Bowden cables.

The known closing auxiliary drive ( DE 20 2012 004 789 U1 ), from which the invention proceeds, is associated with a motor vehicle lock and coupled with this drive via a Bowden cable. The auxiliary closing drive here serves for the motorized adjustment of the latch of the motor vehicle lock from a prelocking position into a main closing position. To generate drive movements of the known auxiliary closing drive is equipped with a drive motor and a drive motor downstream feed gear. The spindle is connected via a coupling element fixed to a Bowden cable of the Bowden cable, so that the auxiliary closing drive is always picked and mounted together with the Bowden cable.

A disadvantage of the known auxiliary closing drive is the fact that the commissioning of the auxiliary closing drive together with the Bowden cable is expensive, especially with regard to storage and transport. Furthermore, care must be taken when mounting on the motor vehicle door o. The like. Care is taken to prevent twisting of the Bowden cable about its longitudinal extent to prevent unwanted mechanical torsional stresses in the Bowden cable to occur. Such mechanical torsional stresses make assembly difficult and can impair the function of the auxiliary closing drive. Very generally, this results in a complicated handling of the known auxiliary closing drive in the context of the production of the motor vehicle.

The invention is based on the problem to design the known auxiliary closing drive such and further, that the handling is simplified in the context of the production of the motor vehicle.

The above problem is solved in a closing auxiliary drive according to the preamble of claim 1 by the features of the characterizing part of claim 1.

Essential is the fundamental consideration that the possibility of a simple installation of the Bowden cable to the auxiliary closing drive, which can be done only in the context of the production of the motor vehicle, causes the transport and storage of the auxiliary closing drive is simplified. It has also been recognized that the assembly of the Bowden cable can only bring about a simplification of the assembly itself within the framework of the manufacture of the motor vehicle.

In detail, it is proposed that the coupling element can be brought into at least one coupling position in which it is accessible from outside for the purpose of producing a coupling of the Bowden cable with the coupling element. Incidentally, the coupling element should be inaccessible from the outside for the production of such a coupling.

The term "from the outside" means that the coupling element from outside the drive housing for the installation of the Bowden cable is correspondingly accessible or inaccessible.

With the proposed solution, the closing auxiliary drive can be brought by the adjustment of the coupling element in a sense in an assembled state in which the installation of the Bowden cable is possible. In view of the fact that the coupling element can preferably be brought into the at least one coupling position by means of the drive motor, the above mounting state can be adjusted easily by motor. With a suitable design, the still releasable in the coupling position coupling between the Bowden cable and the coupling element can thereby convert into an insoluble coupling by a corresponding, in particular motor, adjustment of the coupling element is made. This will be explained later.

In the preferred embodiment according to claim 2, the coupling element can be adjusted during a closing auxiliary operation within an operating range of movement, wherein in a preferred embodiment the Coupling position is outside the operating range of motion. Thus, the coupling position is not approached during normal operation of the auxiliary closing drive at any time, so that there is no risk of unwanted disassembly of the Bowden cable.

In the particularly preferred embodiment according to claim 4, although a certain positive connection between the coupling element and a core end of the Bowden cable of the Bowden cable is provided for the transmission of the drive movements on the Bowden cable, however, allows a rotational movement between the coupling element and core end piece about the longitudinal extent of the Bowden cable. As a result of this rotatability of the Bowden cable core as a whole, mechanical torsional stresses within the Bowden cable are avoided, which make the assembly of the Bowden cable more difficult and can impair the function of the auxiliary closing drive.

In the particularly preferred embodiment according to claim 7, a release of the positive connection between soul end and coupling element is possible only in the at least one coupling position. Once the coupling element is in the operating range of motion, the release of the positive connection is blocked. This can be dispensed with additional locking elements, in particular on clips o. The like., For fixing the core end piece to the coupling element. The above locking of the core end piece to the coupling element can be accomplished easily by a corresponding control of the drive motor.

In the particularly preferred embodiments according to claims 12 to 14, the feed gear for generating drive movements is a spindle-spindle nut transmission. It is in the further preferred embodiment according to claim 14 such that the spindle of the spindle-spindle nut gear is relative to the geometric spindle axis longitudinally displaceable, but rotationally fixed relative to the drive housing. The non-rotatable arrangement of the spindle results either by the rotationally fixed engagement of the Spindelendstücks with the drive housing or by the rotationally fixed engagement of the Spindelendstücks with the coupling element, which in turn is non-rotatably engaged with the drive housing. The former variant is advantageous insofar as a possible longitudinal guidance of the coupling element along the geometric spindle axis is not burdened by the torques occurring around the geometric spindle axis.

According to a further teaching according to claim 15, which has independent significance, a method for producing a proposed auxiliary closing drive as such is claimed.

Essential for the proposed method is that the coupling element, in particular by means of the drive motor, is brought into a coupling position in which it is accessible for mounting the Bowden cable as mentioned above from the outside, and that subsequently the Bowden cable is mounted on the coupling element. This method can be carried out readily within the scope of the production of the motor vehicle, in particular by the adjustment of the coupling element in the coupling position by means of at least temporarily already connected drive motor is possible. Incidentally, reference may be made to all versions of the proposed auxiliary closing drive.

Fig. 1

den strukturellen Aufbau eines vorschlagsgemäßen Schließhilfsantriebs und eines zugeordneten Kraftfahrzeugschlosses im montierten Zustand,

Fig. 2

den Schließhilfsantrieb gemäß Fig. 1 in einem Längsschnitt entlang der Schnittlinie A-A und in einem Querschnitt entlang der Schnittlinie B-B, jeweils bei im Betriebs-Bewegungsbereich befindlichen Kupplungselement,

Fig. 3

verschiedene Stationen eines vorschlagsgemäßen Verfahrens zur Montage eines Bowdenzugs an dem Schließhilfsantrieb gemäß Fig. 1 a) bei noch im Betriebs-Bewegungsbereich befindlichem Kupplungselement, b) bei in der Kupplungsstellung befindlichem Kupplungselement, c) bei mit dem Kupplungselement gekuppelten Bowdenzug und d) bei aufgesetztem Abdeckelement und

Fig. 4

eine Explosionsdarstellung der Spindel und des Kupplungselements des Schließhilfsantriebs gemäß Fig. 1 sowie des Seelenendstücks des Bowdenzugs zwischen Schließhilfsantrieb und Kraftfahrzeugschloss.

In the following, we will explain the invention with reference to a purely exemplary embodiment illustrative drawing. In the drawing shows.

Fig. 1

the structural design of a proposed closing auxiliary drive and an associated motor vehicle lock in the assembled state,

Fig. 2

the closing auxiliary drive according to Fig. 1 in a longitudinal section along the section line AA and in a cross section along the section line BB, in each case located in the operating range of motion coupling element,

Fig. 3

various stations of a proposed method for mounting a Bowden cable to the auxiliary closing drive according to Fig. 1 a) when still in the operating range of movement coupling element, b) befindlichem in the coupling position coupling element, c) coupled with the coupling element Bowden cable and d) with attached cover and

Fig. 4

an exploded view of the spindle and the coupling element of the auxiliary closing drive according to Fig. 1 and the soul end of the Bowden cable between closing auxiliary drive and motor vehicle lock.

The proposed closing auxiliary drive 1 is associated with a motor vehicle lock 2 and serves to transfer the motor vehicle lock 2 from a pre-closed state to a main closed state. The term "motor vehicle lock" as summarized above all types of door, hood, lid or flap locks are summarized.

Fig. 1 shows the structure of the motor vehicle lock 2 with the usual closing elements latch 3 and pawl 4, wherein the latch 3 also in a conventional manner with a striker 5 o. The like. Acts together. Instead of the closing wedge 5 may also be a closing pin, a striker o. The like. Be provided.

Fig. 1 shows that the auxiliary closing drive 1 has its own drive housing 6, which is arranged separately from the motor vehicle lock 2 in the mounted state. The motor vehicle lock 2 is also equipped with a housing 7, which is referred to here as a lock housing.

The auxiliary closing drive 1 is in the assembled state via a Bowden cable 8 drivingly coupled to the motor vehicle lock 2. The Bowden cable 8 has a Bowden cable core 9 and a Bowden cable sheath 10 in the usual way. To generate drive movements, a drive motor 11 is provided with a downstream feed gear 12. The drive movements are primarily those movements that an adjustment of the latch 3 of the in Fig. 1 in the dashed line Vorschließstellung shown in the solid-line main locking position of the latch 3 effect. For this purpose, the latch 7 is preferably coupled to the Bowden cable 9 of the Bowden cable 8, as in Fig. 1 is indicated.

For the discharge of the drive movements, a coupling element 13 is provided, which is adjustable by means of the drive motor 11 within the drive housing 6.

According to the proposal, the coupling element 13, here and preferably by means of the drive motor 11, in at least one coupling position, here in exactly one coupling position brought, in which it is at least partially accessible from outside for the preparation of a coupling of the Bowden cable 8 with the coupling element 13, and incidentally for the production of a corresponding coupling of the Bowden cable 8 is inaccessible from the outside. The coupling position is in Fig. 3b to be recognized by way of example.

As indicated above, a plurality of coupling positions can be provided, which allow a corresponding accessibility of the coupling element 13. In the following, in the sense of a simple illustration, only a single coupling position is mentioned.

Fig. 2 shows the initial state of the auxiliary closing drive 1, from which a closing auxiliary operation can be started. By an adjustment of the coupling element 13 by means of the drive motor 11, the Bowden cable core 9 can be adjusted relative to the Bowden cable 10 such that the latch 3 is transferred from the prelocking in the main closed position. The position of the coupling element 13 at the end of the closing operation is in Fig. 2 shown in dashed line. Subsequently, a provision of the coupling element 13 by a reverse drive of the drive motor 11 or by a spring element, not shown. It follows that the coupling element 13 is adjusted during a closing auxiliary operation within an operating range of motion 14 whose expansion in Fig. 2 is indicated.

In the Fig. 2 shown starting position of the coupling element 13 is additionally shown in the illustration Fig. 3a shown. Here it is clear that the coupling position of the coupling element 13 is outside the operating range of motion 14. Alternatively, it can be provided that the coupling position of the coupling element 13 lies within the operating movement region 14 or at an edge of the operating movement region 14. The former and shown in the drawing alternative shows high security against unwanted disassembly of the Bowden cable 8, as will be shown.

A synopsis of Fig. 3b and 3c shows that for the preparation of a coupling of the Bowden cable 8 a soul end piece 15 of the Bowden cable 9 at in the coupling position befindlichem coupling element 13 is positively engageable with the coupling element 13 in engagement. For this purpose, the coupling element 13 preferably has a Kupplungsausformung 16, which is designed here and preferably trough-like. The trough-like Kupplungsausformung 16 further preferably has an undercut, not shown here, which prevents the core end 15 after insertion, for example, by the elasticity of the Bowden cable 8, without longitudinal movement can jump out of the Kupplungsausformung 16 again.

Interestingly, the fact that here and preferably the Kupplungsausformung 16 allows a positive coupling with a Bowden cable 17, which is based on the longitudinal extent of the Bowden cable 8 rotationally symmetrical, in particular round, designed. In principle, however, any form of Bowdenzugtonne 17 apply.

In a particularly preferred embodiment, the positive connection between the coupling element 13 and core end piece 15 acts in the direction of the drive movements, so that the drive movements can be transmitted via the positive connection. However, the positive locking allows a rotational movement between the coupling element 13 and soul end piece 15 about the longitudinal extension of the Bowden cable 8. This is best seen from a synopsis of the cross-sectional view according to Fig. 2 and the representation according to Fig. 3c , If the design is correspondingly subject to play, mechanical torsional stresses within the Bowden cable core 9 can thus be completely avoided.

Fig. 3c shows that the coupling formation 16 in the coupling element 13 additionally comprises a groove-like formation 18, which runs along the longitudinal extent of the Bowden cable 8. As a result, the core end piece 15 can be easily hooked into the coupling element 13 with the Bowden cable drum 17.

In order to achieve the above rotatability between the coupling element 13 and core end piece 15, it can in principle also be provided that the coupling formation 16 is itself rotationally symmetrical with respect to the longitudinal extension of the Bowden cable 8. Then, as indicated above, find any kind of Bowdenzugtonne 17 application.

Here and preferably, it is such that for the coupling of the Bowden cable 8, the core end piece 15 of the Bowden cable core 9 in befindlichem in the coupling position coupling element 13 (Fig. Fig. 3b ) can be inserted with a mounting direction 19 substantially transversely to the longitudinal extent of the Bowden cable 8 in the coupling element 13. This in Fig. 3 shown hanging the soul end piece 15 is process reliable and realized with little design effort.

In another, not shown here, preferred embodiment, however, it is such that the drive housing 6 has a mounting channel in which the core end 15 of the Bowden cable core 9 of the Bowden cable 8 with a mounting direction substantially along the longitudinal extension of the Bowden cable 8 is used. It is further preferably provided that the mounting channel has a Umlenkkontur which causes a deflection of the core end 15 transverse to the longitudinal extent of the Bowden cable 8. In detail, a mounting direction running along the longitudinal extension of the Bowden cable 8 is deflected here into a mounting direction extending transversely to the longitudinal extent of the Bowden cable 8.

Fig. 3c shows that in the coupling position befindlichem coupling element 13 of the positive connection between soul end piece 15 and coupling element 13 is still solvable. In contrast, located in the operating movement range coupling element 13, the release of the positive connection between soul end piece 15 and coupling element 13, here and preferably by the drive housing 6, locked. This eliminates any additional fastening elements of the Bowdenzugtonne 17 on the coupling element thirteenth

In principle, it can be provided that the coupling element 13 protrudes slightly in the coupling position of the drive housing 6, so that the production of a coupling of the Bowden cable 8 on the coupling element 13 is possible. Here and preferably, however, it is such that the drive housing 6 has a housing cutout 20 through which the coupling element 13 located in the coupling position for the coupling of the Bowden cable 8 on the coupling element 13 from the outside, ie from outside the drive housing 6, is accessible. The housing cutout 20 is best shown in FIG Fig. 3a refer to.

Fig. 3c shows that a cover 21 is provided, which covers the inlet point 22 of the Bowden cable 8 in the drive housing 6 with mounted Bowden cable 8. Preferably, the cover 21 is configured as a cover, which is made in a particularly preferred embodiment of a plastic or rubber material.

However, the cover 21 has not only a covering and / or sealing function, but it locks when befindlichem in the coupling position coupling element 13 ( Fig. 3c This is realized in that the cover 21 has a blocking surface 23 which, when placing the cover 21 on the drive housing 6 in locking engagement with the core end piece 15 of the Bowden cable 8, if provided the coupling element 13 is in the coupling position. The attached state of the cover 21 is in Fig. 3d ).

As indicated above, the cover 21 provides a seal with respect to the drive housing 6 on the one hand and with respect to the bowden cable cover 10 on the other hand, so that the housing cutout 20 is sealed to the outside. For this purpose, the drive housing 6 is provided at the point of engagement with the cover 21 with a seal 24 which is here and preferably configured as a circumferential O-ring.

Fig. 2 shows that the feed gear 12 has an output member 25 which is coupled to the coupling element 13. Here and preferably, the driven element 25, in particular releasably, is in form-locking engagement with the coupling element 13.

The feed gear 12 can basically be designed as a gear with rotary output. The output element 25 is then preferably designed as a pivotable actuating lever or the like. Here and preferably, however, it is so that the feed gear 12 has a linear output. The output member 25 is accordingly only linearly adjustable.

As an alternative to the above-mentioned positive connection between the output element 25 and the coupling element 13, it can be provided that the coupling element 13 is an integral part of the output element 25.

In principle, the coupling element 13 can be designed in several parts. Here and preferably, however, the coupling element 13 is designed in one piece. In a particularly easy to manufacture embodiment, the coupling element 13 is designed as a one-piece plastic injection molded part.

As indicated above, 12 many advantageous variants are conceivable for the realization of the feed gear 12. Fig. 2 shows that the feed gear 12 is designed here as a spindle-spindle nut gearbox with spindle 26 and spindle nut 27. In this case, the spindle nut 27 is preferably coupled to the drive motor 11, so that the spindle 26 provides the output element 25 of the feed gear 12. The spindle nut 27 is preferably a worm wheel that meshes with a worm, not shown, on a drive shaft of the drive motor 11. Advantageous embodiments for the drive of the spindle nut 27 are conceivable. Fig. 2 shows that the spindle nut 27 is rotatable with respect to the geometric spindle axis 28, but axially fixed.

In principle, it can be provided that the coupling element 13 along the geometric spindle axis 28 in the drive housing 6 is longitudinally displaceable, but rotatably guided. Here and preferably, however, it is such that the coupling element 13 itself is not in rotationally fixed engagement with the drive housing 6. However, the spindle 26, in particular via a Spindelendstück 29, coupled to the coupling element 13 and is, more preferably, in relation to the geometric spindle axis 28 rotatably with the coupling element 13 in engagement. Further preferably, it is as in Fig. 2 illustrated, provided that the spindle 26, in particular the Spindelendstück 29, relative to the geometric spindle axis 28 longitudinally displaceable, but rotationally fixed relative to the drive housing 6. For this purpose, the drive housing 6 has a groove-like formation 6c in which the here at least partially tongue-like spindle end piece 29 runs. Characterized in that the Spindelendstück 29 with respect to the geometric spindle axis 28 rotatably with the drive housing 6 in engagement is, as a result, the coupling element 13 against the drive housing 6 rotatably arranged.

Alternatively, it may be provided that the spindle 26 rotatably relative to the geometric spindle axis 28 with the coupling element 13 and the coupling element 13 in turn relative to the geometric spindle axis 28 with the drive housing 6 rotatably engaged. Other advantageous variants for realizing the rotationally fixed arrangement of the spindle 26 in the drive housing 6 are conceivable.

Fig. 2 shows that between the Spindelendstück 29 and the coupling element 13 is a positive connection, which goes back to an insertion of the Spindelendstücks 29 with a mounting direction transverse to the geometric spindle axis 28. For this positive connection, a further coupling formation 30 is provided in the coupling element 13.

The coupling element 13 can basically serve as a triggering element for a sensor element, not shown. In the simplest case, the sensor element is a microswitch which can be triggered by the coupling element 13. It is particularly advantageous that the drive housing 6 has two sub-housing 6a, 6b, which are joined together in the mounted state. The microswitch is preferably arranged completely within the drive housing 6. This means that when the drive housing 6 is open, the microswitch is inserted into its mounting position, in particular inserted.

Further, the coupling element 13 can be used to provide at least one end stop for the drive movements. It is preferably provided that the coupling element 13 is equipped with a corresponding damping arrangement, so that the start of an end stop is correspondingly damped.

The Bowden cable casing 10 is preferably arranged on the drive housing 6. For the coupling of the Bowden cable housing 10 with the drive housing 6, various advantageous variants are conceivable. Preferably, the Bowden cable housing 10 is rotatably articulated relative to the longitudinal extent of the Bowden cable 8 on the drive housing 6, so that, as above in connection with the Bowden cable soul 9 addressed, any mechanical torsional stress in the Bowden cable 8 is avoided.

The structural design of the drive housing 6 is also important here. The drive housing 6 has an elongated portion 31 which receives the coupling element 13 and at the end of which the above-mentioned housing cutout 20 is arranged. The elongated portion 31 is part of the housing part 6a, which is designed here and preferably in one piece. Incidentally, the drive housing 6 has a lid-like section 32, which likewise has an elongated section 33 for receiving the spindle 26. The lid-like portion 32 is provided by the second housing part 6b, which is here and preferably likewise designed in one piece. The two housing parts 6a, 6b are joined together in an assembly movement, which runs essentially along the geometric spindle axis 28, and clipped, screwed, glued or potted.

According to another teaching, which also has independent significance, a method for assembling the Bowden cable 8 to the proposed auxiliary closing drive 1 is claimed.

It is essential according to the proposed method that the coupling element 13, here and preferably by means of the drive motor 11, in a coupling position ( Fig. 3b ) is brought, in which it is accessible from the outside for the preparation of a coupling of the Bowden cable 8 with the coupling element 13, wherein then the Bowden cable 8 is coupled to the coupling element 13. Preferably, the adjustment of the coupling element 13 in the coupling position is preceded by an assembly of the auxiliary closing drive 1 and / or the motor vehicle lock 2 in or on the associated motor vehicle door. This upstream assembly process is preferably accompanied by an electrical connection of the drive motor 11, so that the adjustment of the coupling element 13 in the coupling position can be done easily by a motor.

In connection with the proposed method may also be noted that the mounting direction for the coupling of the Bowden cable 8 with the coupling element 13 is preferably transverse to the longitudinal extent of the Bowden cable 8, as explained above. As far as and as to possible alternatives to this mounting direction may be made to the above statements on the proposed closing auxiliary drive 1.

Claims (15)

1. Locking aid drive for a motor vehicle lock (2), a drive housing (6) being provided, the locking aid drive (1) being couplable in terms of drive to the motor vehicle lock (2) via a Bowden cable (8) with a Bowden cable core (9) and Bowden cable sheath (10) and a drive motor (11) with a downstream feed mechanism (12) for producing driving movements and a coupling element (13) for transferring the driving movements being provided,
   characterized in that
   the coupling element (13) can be brought, in particular by means of the drive motor (11), into at least one coupling position in which said coupling element is accessible from the outside for the production of a coupling of the Bowden cable (8) to the coupling element (13), and otherwise is inaccessible from the outside for the production of a coupling of the Bowden cable (8) to the coupling element (13) .
2. Locking aid drive according to Claim 1, characterized in that the coupling element (13) is adjusted within an operating movement range during a locking aid operation, preferably in that the coupling position lies outside the operating movement range, or in that the coupling position lies within the operating movement range.
3. Locking aid drive according to Claim 1 or 2, characterized in that, for the coupling of the Bowden cable (8), a core end piece (15) of the Bowden cable core (9) can be brought into engagement in a form-fitting manner with the coupling element (13) when the coupling element (13) is in the coupling position, preferably in that the coupling element (13) has a coupling formation (16) for this purpose, furthermore preferably in that the coupling formation (16) permits a form-fitting coupling to a Bowden cable drum (17) which has a rotationally symmetrical, in particular round configuration with respect to the longitudinal extent of the Bowden cable (8).
4. Locking aid drive according to Claim 3, characterized in that the form-fitting connection between coupling element (13) and core end piece (15) acts in the direction of the driving movements, but permits a rotational movement between coupling element (13) and core end piece (15) about the longitudinal extent of the Bowden cable (8).
5. Locking aid drive according to one of the preceding claims, characterized in that, for the coupling of the Bowden cable (8), a core end piece (15) of the Bowden cable core (9) is insertable into the coupling element (13) with an installation direction substantially transverse with respect to the longitudinal extent of the Bowden cable (8) when the coupling element (13) is in the coupling position.
6. Locking aid drive according to one of Claims 3 to 5, characterized in that the drive housing (6) has an installation channel into which the core end piece (15) of the Bowden cable core (9) is insertable with an installation direction substantially along the longitudinal extent of the Bowden cable (8), preferably in that the installation channel has a deflecting contour which brings about a deflection of the core end piece (15) transversely with respect to the longitudinal extent of the Bowden cable (8).
7. Locking aid drive according to one of Claims 3 to 6, characterized in that, when the coupling element (13) is in the coupling position, the form-fitting connection between core end piece (15) and coupling element (13) is releasable, and in that, when the coupling element (13) is in the operating movement range, the release of the form-fitting connection between core end piece (15) and coupling element (13) is blocked, in particular by the drive housing (6).
8. Locking aid drive according to one of the preceding claims, characterized in that the drive housing (6) has a housing cutout (20) through which the coupling element (13) in the coupling position is accessible from the outside for the coupling of the Bowden cable (8).
9. Locking aid drive according to one of Claims 3 to 8, characterized in that a covering element (21) is provided which, when the Bowden cable (8) is fitted, covers the entry point (22) of the Bowden cable (8) into the drive housing (6), and in that, when the coupling element (13) is in the coupling position, the covering element (21) locks the release of the form-fitting connection between core end piece (15) and coupling element (13), preferably in that the covering element (21) is configured as a covering bush.
10. Locking aid drive according to Claim 9, characterized in that the covering element (21) provides a seal in relation to the drive housing (6), on the one hand, and in relation to the Bowden cable sheath (10), on the other hand, such that the housing cutout (20) is sealed towards the outside.
11. Locking aid drive according to one of the preceding claims, characterized in that the feed mechanism (12) has an output element (25) which is coupled to the coupling element (13), preferably in that the output element (25) is in engagement in a form-fitting manner with the coupling element (13).
12. Locking aid drive according to one of the preceding claims, characterized in that the feed mechanism (12) is configured as a spindle/spindle nut mechanism with spindle (26) and spindle nut (27), preferably in that the spindle nut (27) is coupled to the drive motor (11) such that the spindle (26) provides the output element (25) of the feed mechanism (12).
13. Locking aid drive according to one of the preceding claims, characterized in that the coupling element (13) is guided in a longitudinally displaceable, but non-rotatable manner along a geometrical spindle axis (28) in the drive housing (6).
14. Locking aid drive according to Claim 12 and possibly according to Claim 13, characterized in that the spindle (26) is coupled, in particular via a spindle end piece (29), to the coupling element (13), preferably in that the spindle (26) is longitudinally displaceable with respect to the geometrical spindle axis (28), but is non-rotatable in relation to the drive housing (6), preferably in that the spindle end piece (29) is in engagement with the drive housing (6) non-rotatably with respect to the geometrical spindle axis (28), or in that the spindle (26) is in engagement with the coupling element (13) non-rotatably with respect to the geometrical spindle axis (28) and the coupling element (13) is in engagement with the drive housing (6) non-rotatably with respect to the geometrical spindle axis (28).
15. Method for installing a Bowden cable (8) on a locking aid drive (1) according to one of the preceding claims,
    characterized in that
    the coupling element (13) is brought, in particular by means of the drive motor (11), into a coupling position in which said coupling element is accessible from the outside for the production of a coupling of the Bowden cable (8) to the coupling element (13), and in that the Bowden cable (8) is subsequently coupled to the coupling element (13).

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